I first heard about Light Field Cameras from a industral trainee called Matthew Shotton. Although as Tony points out on Twitter, it was the idea of using it for video which drive the project. He built a system for Makerfaire 2010 which pushed a DSLR along a short track and take pictures at certain intervals. Once taken he pulled them into a application he built which turns them into a camera which has endless focus points… (we really should have documented this better, oh well next time for sure)
Of course theres many people working in this area and my focus is more about the grassroots and open, but its interesting to see the commercial play.